# Parameter `CamXclkFreqMhz`

**Camera xclk Frequenz in Mhz**

- Set the **Camera xclk Frequenz in Mhz**.

Default Value: `20`

See [here](../datasheets/Camera.ov2640_ds_1.8_.pdf) for the ov2640 camera datasheet.<br>
See [here](../datasheets/OV5640_datasheet.pdf) for the ov5640 camera datasheet.

!!! Warning
    After changing this parameter you need to update your reference image and alignment markers!